Refrigerator



Oct.. 7, 1930. l.. G. coPEMAN REFRIGERATOR Filed Jan. 5, 1928 INVENToR. lyg; f peman BY m Mm, f

' A TTORNEY.

Patented t; 7, 1953@ I i Unire srar'as PATENT OFFICE LLOYD G. GOPEMAN, QEFLINT, MICHIGAN, .ASSIGNOR TO COPEMAN LABORATORIES GCIIYIPAL'NY,i 0F FLINT, jMICHIGAN, A. CORPORATION OF MICHIGAN REFBIGEBATOB Appneaeon mea January 5, 192s. serial Np'. 244,579.

This invention relates *to refrigerators,

and has for its object a lrefrigerator which.

filed November 25, 1927, I 'have described and claimed a refri erator in which the in side' lining for a re rigerator is coupled up' with the lowside of a mechanical refrigerating unit for the pur oseof abstracting the heat more uniformly rom all regions of the refrigerator.

The object of the present invention isto provide a stone refrigerator unitwhich has the same function of more evenly abstracting the heat from all regions of the refrigerator, and which at the same time is lined with metal so as to form a vprotecting coat for the stone, and also formin a core for casting the stone in the manu acture of the refrigerator. This will be more fully explained hereinafter.

In the drawings:

Fig. 1 is a vertical section through the refrigerator.

Fig. 2 isa crosssection of the same.

Fig. 3 is a perspective showing the inner shell of metal.

Referring to the drawings, the outer shell ofthe box may be made of wood or any othersuitablel material and this is designated a. Preferably within this is laid on a well known insulating material, such as cork board b, which may be nailed or fitted into place in the outer shell. I@

A sheet metal lining, preferably a unit lshell c of metal that can be formed by welding, or a hea-vy press operation is provided. This shell is preferably nish'ed on the yinside by glass enameling or covering w with any suitable pyroxylin lacquer or' other porcelain finish. This shell has a lowside box-like shell 4portion designated d. This expansion unit or lowside may be a boiling chamber, butI have shown it here as a stone casting into which are cast the pipes e of the expansion coil. The box-like lowside shell is provided with welded-in sharp freezing chamber shells f which also act as cores in the stone casting. operation.

One of the great advantages of this arrangement is that it provides a sheet metal lining which is absolutely impervious to water and at the same time the liningitself forms the inside core for castino the stone. The shell is placed within the cabinet formed by the outer shell and the insulation. It can be properly spaced from the insulation, and 4then the plastic stone poured between the insulation and the shell. This stone composition is preferably an oxychloride cement, but mi ht be anyv other suitable plastic material. Te plastic stone unites with the insulation and Ioxychloride cement, V.and

. also with the metal. lAn Oxy-chloride composition suitable for this purpose is described in In prior Patents 1,644,987 and 1,644,988, date October 11, 1927. "However, this stone composition may be varied within Wide limits without departing from my 'invention.` A great advantage in employing this lining is that it takes the placeof an expensive core. Furthermore, it prevents moisture from the chamber reaching the stone, and also protects the stone by affording a strong, tenacious lining therefor.

6nd that with the box constructed as described,that it is possible to shi out the refrigerators very shortly after t e have been poured. In fact, these oxy-c loride cement mixes such as I have described will be still enough in one or two hours after they have been poured so that the box `can be shipped, if this is desirable. The lining will hold the mix so that the same can harden and set during the transportation. In the old practice, a large quantity of expensive cores have to be operated in order to maintain a given temperature in the food chamber.

' With this large stone surface to be kept cold by abstractionof the heat, it will be obvious that a great deal of heat will be exchanged between the food chamber and this stone before the unit is called upon again to operate. This saves Wear and tear on the unit, as considerable strain is put upon the unit in frequently starting and stopping it.

What I claim is:

l. A refrigerator, having in combination a cabinet, an inner shell of sheet metal including a portion arranged to cover refrigerant receiving and circulating means, and an initially plastic stone layer intervening between the inner shell and the cabinet and defining the sharp freezing chamber and serving to act as a hold-over, said shell forming a mold for receiving the plastic stone and for sealing the same after setting.

2. A refrigerator, having in combination a cabinet, a metal shell forming the lining of the cabinet and a sharp freezing chamber, and acast stone layer intervening between the cabinet and the metal shell and encasing the sharp freezing chamber to form a lowside, said stone acting as a hold-over and said shell serving as a mold in casting the stone.

3. A refrigerating unit having in combination a cabinet including insulating material, one or more sharp freezing chambers formed in said cabinet, said sharp freezing chambers being defined by permanent air tight metallic Walls, refrigerant receiving and circulating means positioned in heat conducting relation to said permanently formed wall and said Walls serving as a mold for receiving plastically applied material around said walls` said refrigerant conducting means being embedded in said material and said material having relatively high heat conducting and holdover properties and being of a relatively great mass so as to act as a hold-over.

4. A refrigerating unit having in combination a cabinet including insulating material. one or more sharp freezing chambers formed in said cabinet, said sharp frezing chambers being defined by permanent air tight metallic walls, refrigerant receiving and circulating means positioned in heat conducting relation to said permanently formed Walls and plastically applied stone around said walls, said refrigerant conducting means being embedded in said stone and said stone having relatively high heat conducting and holdover properties and being of a relatively great mass so as to act as a hold-over, said permanent walls serving as molds for said plastically applied material and said plastically applied material filling the entire space between the sharp freezing containers and around the same and also filling in the space between the sharp freezing containers and the insulating material.

5.v A refrigerating unit, comprising a cabinet including a lining of insulating material, a metal lining set Within the cabinet to form the exposed surfaces therefor and having in-v tegrally formed `projecting portions forming sharp freezing chambers. means for receiving and conducting a volatile refrigerant positioned in heat conducting relation withsaid projecting portions forming the sharp freezing chambers, said lining forming a mold for receiving a relatively large mass of heat conducting and hold-over material plastically applied and allowed to set around said refri gerant conducting means, said metal lining eX- cluding the air from said plastically applied material. y

6. A refrigerating cabinet comprising an outer shell and an inner'shell of insulating material, an inner metallic shell forming one or more sharp freezing chambers and form`-' ing the interior exposed surface of the'cabinet, refrigerant circulating coils positioned between said metallic inner shell and said insulating material, and a layer of stone filling the space between said metallic shell and insulating material and covering said coils` said stone being initially plastically applied and said metallic shell forming a mold for receiving said stone and for covering the same after the setting operation.

-7. A refrigerating cabinet comprising an outer shell, an inner shell of insulating material and a metallic inner shell forming a large storage space and one or more sharp freezing chambers, said shell being spaced from saidy insulating material, refrigerant conducting coils positioned closely adjacent said sharp freezingchamber or chambers and within said shell, a layer of stone between said shell and said insulating material and covering 1 said coils. said shell serving as a mold for l forming the stone walls around the main storage chamber and around the sharp freezing chamber or chambers.

In testimony whereof I have affixed my signature.

LLOYD G. COPEMAN. 

